Q
What does the parseInt function do in JavaScript?

Answer & Solution

Answer: Option B
Solution:
The parseInt function parses a string and returns an integer.
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What will be the result of typeof function() {} in JavaScript?

A). function

B). object

C). undefined

D). method

Which type conversion happens automatically in the expression 3 + '5'?

A). Number to String

B). String to Number

C). Boolean to String

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What is the initial type of a variable declared with let a;?

A). null

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C). undefined

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What is the result of the following code: let x = 5; x = 'hello'; console.log(typeof x);?

A). number

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What will typeof null return in JavaScript?

A). null

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D). number

What is the result of typeof [] in JavaScript?

A). array

B). object

C). list

D). undefined

Given the code: let y = 10; y = true;, what is the type of y after execution?

A). number

B). boolean

C). string

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Which operator is used to determine the type of a variable in JavaScript?

A). typeof

B). instanceof

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What will be the result of the following code: let z = '123'; z = Number(z); console.log(typeof z);?

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A). Checks if a value is not a number

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C). Checks if a value is a number

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